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Radio frequency identification (RFID) is a promising technology for identifying physical objects in an automated manner, but raises privacy infringement problems significantly in the real world. The low-cost RFID tags are much more vulnerable, meaning traceable, than active tags due to their restricted (poor) capabilities. In this paper, we present a practical method for enhancing the privacy of consumers,...
In delay and disruption tolerant networks (DTNs), there are no stable end-to-end paths because the connectivity of nodes is frequently disrupted by their mobility, power saving or other reasons. Nevertheless nodes can communicate each other by a store-and-forward paradigm if there are end-to-end paths on the union of network snapshots over time. Many previous studies have proposed routing protocols...
In this paper, we introduce a novel concept of Virtual Mobile Network. When a mobile router has multiple egress interfaces and uses each interface to connect different access networks simultaneously, the mobile router can offer multiple virtual subnets to its mobile network nodes. Each mobile network node can select one of the mobile router's egress interfaces to forward its traffic, based on the...
Mobile WiMAX aims to provide multimedia multicast/broadcast service (MBS) as well as elastic data service. However, supporting delay sensitive applications like video/audio streaming is still challenging, which requires both efficient handling of link bandwidth and reducing handover delays. To reduce the handover delay in MBS, the IEEE 802.16e standard defines an MBS zone, which is a group of base...
Recently, vehicular networks have begun to attract much attention in industry as well as academia. In particular, IEEE 802.11-based solutions for vehicular networks are also investigated by IEEE 802.11p. As the original IEEE 802.11 standard is designed only for little mobility, the IEEE 802.11p working group should address important issues such as frequent disconnection and handoff. We first introduce...
In a mobile network that is multihomed by multiple mobile routers, a mobile router that loses link connectivity can be replaced by the other mobile routers. We propose a transparent failover mechanism (TFM) to provide seamless Internet services to nodes in the mobile network, which is validated by implementing a real test-bed. Compared to the network mobility basic support protocol, TFM does not require...
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